An evaluation of an influenza vaccination campaign targeting pregnant women in 27 clinics in two provinces of South Africa, 2015 – 2018 oleh Kate Bishop, Meredith McMorrow, Susan Meiring, Sibongile Walaza, Liza Rossi, Sarona Mhlanga, Stefano Tempia, Azwifarwi Mathunjwa, Jackie Kleynhans, Grace D. Appiah, Johanna M. McAnerney, Heather J. Zar, Cheryl Cohen